40383779 has 2 divisors, whose sum is σ = 40383780. Its totient is φ = 40383778.

The previous prime is 40383713. The next prime is 40383803. The reversal of 40383779 is 97738304.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40383779 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40383709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20191889 + 20191890.

It is an arithmetic number, because the mean of its divisors is an integer number (20191890).

Almost surely, 2^40383779 is an apocalyptic number.

40383779 is a deficient number, since it is larger than the sum of its proper divisors (1).

40383779 is an equidigital number, since it uses as much as digits as its factorization.

40383779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 40383779 is about 6354.8232862921. The cubic root of 40383779 is about 343.0854646260.

The spelling of 40383779 in words is "forty million, three hundred eighty-three thousand, seven hundred seventy-nine".